Currencies Of The World

Currency is a generally accepted form of money, which includes both coins and paper notes. Currency is issued by a government of sovreign nation and circulated within an ecomony.
It is used as a medium of exchange for goods and services, buying and selling, currency is the basis for trade.

Generally speaking each country has its own currency. There about 160 official national currencies in the world and of which, US dollar is the most-traded currency in the world.